Imaging fractional incompressible stripes in integer quantum Hall systems

Abstract

Transport experiments provide conflicting evidence on the possible existence of fractional order within integer quantum Hall systems. In fact integer edge states sometimes behave as monolithic objects with no inner structure, while other experiments clearly highlight the role of fractional substructures. Recently developed low-temperature scanning probe techniques offer today an opportunity for a deeper-than-ever investigation of spatial features of such edge systems. Here we use scanning gate microscopy and demonstrate that fractional features were unambiguously observed in every integer quantum Hall constriction studied. We present also an experimental estimate of the width of the fractional incompressible stripes corresponding to filling factors 1/3, 2/5, 3/5, and 2/3. Our results compare well with predictions of the edge-reconstruction theory.

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Cited by in corpus (27)

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• Anyons in Quantum Hall Interferometry
• Theory of scanning gate microscopy
• Imaging the Conductance of Integer and Fractional Quantum Hall Edge States
• Fractional Edge Reconstruction in Integer Quantum Hall Phases
• Shot-noise evidence of fractional quasiparticle creation in a local fractional quantum Hall state
• Inter-Edge Backscattering in Buried Split-Gate-Defined Graphene Quantum Point Contacts
• Density functional theory of the fractional quantum Hall effect
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• Emergence of Neutral Modes in Laughlin-like Fractional Quantum Hall Phases
• Probing interactions via non-equilibrium momentum distribution and noise in integer quantum Hall systems at $\nu =2$
• Mapping quantum Hall edge states in graphene by scanning tunneling microscopy
• Manipulating quantum Hall edge channels in graphene through Scanning Gate Microscopy
• Scanning Gate Imaging of quantum point contacts and the origin of the 0.7 Anomaly
• Wave function description of conductance mapping for quantum Hall electron interferometer
• Probing breakdown of topological protection: Filling-factor-dependent evolution of robust quantum Hall incompressible phases
• Accurate characterization of tip-induced potential using electron interferometry
• Edge Reconstruction and Emergent Neutral Modes in Integer and Fractional Quantum Hall Phases
• Investigating Energy Scales of Fractional Quantum Hall States using Scanning Gate Microscopy
• Coherent edge mixing and interferometry in quantum Hall bilayers
• Supercurrent modulation in InSb nanoflag-based Josephson junctions by scanning gate microscopy
• Elevated Hall Responses as Indicators of Edge Reconstruction
• Collapse of edge reconstruction in compressible Quantum Hall fluid within filling fraction range 2/3 to 1
• Imaging disorder-induced scattering centers in quantum Hall incompressible strip